Stamp



FIG. 1 is a perspective view of a stamp, showing our new design;

FIG. 2 is a front elevation view thereof;

FIG. 3 is a rear elevation view thereof;

FIG. 4 is a side elevation view thereof;

FIG. 5 is a another side elevation view thereof;

FIG. 6 is a top plan view thereof; and,

FIG. 7 is a bottom plan view thereof.

The broken lines illustrating portions of the stamp are for environmental purposes only and form no part of the claimed design. 

CLAIM We claim, the ornamental design for a stamp, as shown and described. 